66516745504 has 48 divisors (see below), whose sum is σ = 142881550560. Its totient is φ = 30230287360.

The previous prime is 66516745483. The next prime is 66516745513. The reversal of 66516745504 is 40554761566.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3578667 + ... + 3597205.

It is an arithmetic number, because the mean of its divisors is an integer number (2976698970).

Almost surely, 2^66516745504 is an apocalyptic number.

It is an amenable number.

66516745504 is an abundant number, since it is smaller than the sum of its proper divisors (76364805056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66516745504 is a wasteful number, since it uses less digits than its factorization.

66516745504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28753 (or 28745 counting only the distinct ones).

The product of its (nonzero) digits is 3024000, while the sum is 49.

The spelling of 66516745504 in words is "sixty-six billion, five hundred sixteen million, seven hundred forty-five thousand, five hundred four".